Template:Infobox aluminium

Aluminium,  13Al
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General properties
PronunciationTemplate:Infobox element/pronunciation
Alternative namealuminum (U.S., Canada)
Appearancesilvery gray metallic
Standard atomic weight (Ar, standard)Template:Infobox element/standard atomic weight
Mass numberTemplate:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Aluminium in the periodic table
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Atomic number (Z)13
GroupTemplate:Infobox element/group
Periodperiod 3
Blockp-block
Element categoryTemplate:Infobox element/category format, sometimes considered a metalloid
Electron configuration[Ne] 3s2 3p1
Electrons per shell
2, 8, 3
Physical properties
Phase at STPsolid
Melting point933.47 K ​(660.32 °C, ​1220.58 °F)
Boiling point2743 K ​(2470 °C, ​4478 °F)
Density (near r.t.)2.70 g/cm3
when liquid (at m.p.)2.375 g/cm3
Heat of fusion10.71 kJ/mol
[[Enthalpy of vaporization|Heat of Template:Engvar]]284 kJ/mol
Molar heat capacity24.20 J/(mol·K)
[[Vapor pressure|Template:Engvar pressure]]
Atomic properties
Oxidation statesTemplate:Infobox element/symbol-to-oxidation-state
ElectronegativityPauling scale: 1.61
[[Ionization energy|Template:Engvar energies]]
  • 1st: 577.5 kJ/mol
  • 2nd: 1816.7 kJ/mol
  • 3rd: 2744.8 kJ/mol
  • (more)
Atomic radiusempirical: 143 pm
Covalent radius121±4 pm
Van der Waals radius184 pm
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Other properties
Crystal structureTemplate:Infobox element/crystal structure
Speed of sound thin rod(rolled) 5000 m/s (at r.t.)
Thermal expansion23.1 µm/(m·K) (at 25 °C)
Thermal conductivity237 W/(m·K)
Electrical resistivity26.5 nΩ·m (at 20 °C)
Magnetic orderingparamagnetic[1]
Magnetic susceptibility+16.5·10−6 cm3/mol
Young's modulus70 GPa
Shear modulus26 GPa
Bulk modulus76 GPa
Poisson ratio0.35
Mohs hardness2.75
Vickers hardness160–350 MPa
Brinell hardness160–550 MPa
CAS Number7429-90-5
History
Namingafter alumina (aluminium oxide), itself named after mineral alum
PredictionAntoine Lavoisier (1782)
Discovery and first isolationHans Christian Ørsted (1824)
Named byHumphry Davy (1812)
Main isotopes of aluminium
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| references

Template:Infobox element/element navigation Template:Template reference list One of these is a named reference. It may be cited in the containing article as

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  1. Lide, D. R. (2000). "Magnetic susceptibility of the elements and inorganic compounds" (PDF). CRC Handbook of Chemistry and Physics (81st ed.). CRC Press. ISBN 0849304814.
  2. D. C. Tyte (1964). "Red (B2Π–A2σ) Band System of Aluminium Monoxide". Nature. 202 (4930): 383. Bibcode:1964Natur.202..383T. doi:10.1038/202383a0.
  3. Dohmeier, C.; Loos, D.; Schnöckel, H. (1996). "Aluminum(I) and Gallium(I) Compounds: Syntheses, Structures, and Reactions". Angewandte Chemie International Edition. 35: 129–149. doi:10.1002/anie.199601291.